Many overweight who want to get fast results are committing a big mistake to exercise long hours of cardio and aerobic exercises. Without a doubt, aerobic exercises have many benefits for health and to burn fat. But that is the essence of your training program is long hours of aerobics, this causes big problems:
Studies have shown that aerobic exercises long (especially running) erode and break down muscle mass, as you can see in the two images at the top
Aerobic exercise for long periods and many times leads to the body get used to these exercises, and thus the body burns fewer calories with these exercises with the passage of time
Aerobic exercises for long periods caused big problems joints and back to overweight. And Add to that the great boredom and boredom of the training program.
Solution: Studies have shown that the best exercises for weight loss and fat burning is a combination of iron and cardio exercises.